Solve the problem.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 40 mph results in a rating of 40 mpg, where as at an average speed of 50 mph, her car rates 35 mpg. Find an equation to model the gas mileage y for an average speed of x mph.
A. y = 2x + 60
B. y = 2x + - 20
C. y = -
x + - 20
D. y = -
x + 60
Answer: D
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Find the center (h, k) and the radius r of the circle. Graph the circle.(x + 1)2 + (y + 5)2 = 4
A. (h, k) = (-1, -5); r = 4
B. (h, k) = (-1, -5); r = 2
C. (h, k) = (1, 5); r = 4
D. (h, k) = (1, 5); r = 2
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 
D. 
Solve the problem.How many different three-number "combinations" are possible on a combination lock having 34 numbers on its dial without repeating a number?
A. 69,564 B. 35,904 C. 17,952 D. 34,782
Use one of De Morgan's laws to write the negation of the statement.I was a day late and a dollar short.
A. I was a day late or not a dollar short. B. I was not a day late and a dollar short. C. I was not a day late and not a dollar short. D. I was not a day late or not a dollar short.